RE: i022: Relationship to the SOAP Binding Framework: a SOAP Request MEP and OneWay HTTP Binding

Good question.  The WSDL SOAP binding would specify the one-way MEP for
a wsdl in-out to tell the binding whether it's a soap req-response
binding or 2 soap one-way bindings.   I don't think it is that useful
for a wsdl in only mep to distinguish between request vs request
response mep as the one-way or the req-resp binding seem to be the same
thing in the one way case.

 

Some of the possible scenarios I see are:

1. wsdl in, soap request mep, soap one-way binding

2. wsdl in, soap request-resp mep, soap req resp binding

3. wsdl in-out, soap req-resp mep, soap req resp binding

4. wsdl in-out, soap request mep, 2 soap one-way bindings (the callback
scenario)

5. wsdl in-out, soap req-resp mep, 2 soap req resp bindings

 

Note that #5 - which I proposed - has been precluded by the WSDL 2.0 WG.
Effectively, the WSDL 2.0 group forced the creation the request mep for
wsdl in-outs that is a callback over 2 http connections.

 

Cheers,

Dave

 

  _____  

From: Jonathan Marsh [mailto:jmarsh@microsoft.com] 
Sent: Thursday, December 23, 2004 1:59 PM
To: David Orchard; public-ws-addressing@w3.org
Subject: RE: i022: Relationship to the SOAP Binding Framework: a SOAP
Request MEP and OneWay HTTP Binding

 

How precisely would one use this MEP in the WSDL SOAP binding?
Specifically I'm wondering if there will ever be cases where it's not
clear whether to use this MEP or the existing SOAP Request-Response MEP.

 

  _____  

From: public-ws-addressing-request@w3.org
[mailto:public-ws-addressing-request@w3.org] On Behalf Of David Orchard
Sent: Friday, December 17, 2004 2:06 PM
To: public-ws-addressing@w3.org
Subject: i022: Relationship to the SOAP Binding Framework: a SOAP
Request MEP and OneWay HTTP Binding

 

I offer up the first new W3C SOAP MEP and Binding in many a moon...

 

I've written up a first draft of a proposed WS-Addressing Adjuncts with
a SOAP request MEP and a one-way SOAP HTTP Binding.  I believe this is
sufficient to close issue 22.  

 

I think it allows the soap request-response MEP to be layered on 2
one-way SOAP HTTP Bindings, but I haven't really verified it.  I've had
a few problems with the links, which I will work on once y'all have had
a chance to review.  I basically copied the soap 1.2 adjuncts MEP and
Binding section.

 

Some of the tricky areas that I thought I'd call out:

- There is an optional binding specific response in the one-way MEP.

- Relationship to media type.  I think this be covered by the soap
media-type, but I'm not 100% sure.  I'm not sure about the case of
whether a soap+xml is good enough for this mep+binding, I sure hope so
though.

- Webmethod support: I said POST only

- The identification of the mep in use can't be gleaned from the
information in the binding, unlike the SOAP HTTP Binding

- Streaming: I consistently said that requesting SOAP nodes must avoid
deadlock by accepting binding-specific response messages

- I removed "receiving" state from the next state tables.

- SOAP faults cannot come back over the http response.  For
request-response bound to 2 http requests, life sucks.

- The binding can allow an empty body, especially for cases where the
action is sufficient.

- I kept the HTTP status code at 200

 

I would also like to mention that I found this exercise very
informative.  I think that SOAP has provided an excellent framework for
creating interoperable meps and bindings as it forced me to think about
many hard issues.

 

Cheers,

Dave